Automatic shoe machine



1945- E. J. RAY

AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet l My 0 0.. 4 1w 8 7 9 O o o W 1 H. 0 W G a a J 3 7 9 6 W O .Q/N @M l 4 n /vv wfl 7 Ill 01 2 III 7 0 0 7 5 0 7 W5 Feb. 6, 1945;

E. J. RAY

AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet 2 Filed May 26, 1943 14 Sheets-Sheet 3 Feb. 6, 1945. E, 3, RAY 2.368,878

AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet 4 if? A55 Fig: 4

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AUTOMATIC SHOE MACHINE Filed my 26, 1945 14 Sheets-Sheet 5 I Feb. 6, 1945. E RAY AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet 6 Ill/r12 Feb. 6, 1945.

E. J. RAY

AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet 7 Feb. 6, 1-945. E. J. RAY

AUTOMATIC SHOE MACHINE Filed May 26, 1943 i4 Sheet s-Sheet 8 JII w w V v VIII/III,

Feb. 6, 1945. a. J. RAY

AUTOMATIC SHOE MACHINE Filed May 26,- 1943 14 Sheets-Sheet 9 Feb. 6, 1945. E. J. RAY

AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet 10 4 0 1 w v o w Feb. 6, 1945.

E. J. RAY

AUTQMATIC SHOE MACHINE 14 Sheets-Sheet 1-1 Filed May 26. 1943 Feb. 6,1945. 5 J Y AUTOMATIC SHOE MACHINE 14 Sheets-Sheet -l2 Filed May 26, 1943 Feb. 6, 1945. E. J. RAY I AUTOMATIC SHOE MACHINE Filed May 26, 1943 1 Sheets-Sheet 13 Feb. 6, RAY

AUTOMATIC SHOE MACHINE Filed May 26, 1943 14 Sheets-Sheet l4 /A/vE/vmA= Patented Feb. 6, 1945 -AU'IOMATIC SHOE "MACHINE Eugene J. Ray, Beverly, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. '41., a corporation of New Jersey Application May 26, 1943, Serial .No. 488,483

34 Claims.

The purpose of the present invention is to provide improvements in automatic shoe machines of the type in whicha shoe is fed and turned end for end with respect to a poweroperated instrumentality that remains in one locality to operate progressively on the margin or perimeter of the shoe bottom. Among the operations in this category are inseaming, inseam trimming, outsole stitching, edge trimming and edge setting. 7

One of the problems common to all machines of the type mentioned is due to the lengthwise and widthwise curvatures of the shoe bottoms.

.These curvatures, unless something were done'to counteract the effects of the various .slo'pes produced by them, would disturb the normal relation between the work and'the instrumentality that performs the operation. For this reason automatic machines of the type mentioned have heretofore included means for rolling a'shoe sidewise to counteract the slopes due to transverse curvatures, and means for pitching the shoe to counteract the slopes due to lengthwise curvatures These rolling and pitching motions, when imparted to the shoe, must also be imparted to a heavy jack by which the shoe is carried. Moreover, they modify the effects of the cams "by which the shoe is fed and turned end for end, with the result that it is exceedingly difiicult to coordinate the four cams comprised in a set required to produce all the motionsabove specified. This problem is further complicated by two other motions, one of which is necessary to en-. able the operation to progress according to the plan configuration of thes'hoe bottom, and the other of which is necessary to counteract heightwise factors due to the spring and arch of the shoe bottom.

To simplify the problem of designing the several cams for any selected style of shoe, and at the same time to insure improved control and timin of the several motions, one of the immovements provided by the invention consists in power-operated means for imparting the roll and pitch motions not to the shoe and the jack, out to the instrumentality that performs the operation on the 'shoe, in combination with power-operated 'means for imparting the feed motion to a work-carriage and the turning motion to the shoe and the jack.

' "This divorcement of the roll and pitch motions from the recipient of the feed and turning motions permits other improvements embodied in the means for feeding and turning the shoe.

For example, the feed motion is imparted to a feed-carriage thattravelsto and fro in a straight path and carries a jack on which the shoe is mounted. The jack-post is arranged-to turn and is also arranged to; swing about a fixedaxis parallel .with the path of the feedcarriage to counteract curvatures in the plan configuration of the shoe bottom. Moreover, the jack-post is arranged to move up and down: along its own axis withinlimits corresponding to the heightwise curvatures of the shoe'b'ottomabove mentioned,'and in so doing to maintain the point of operation at a constant level withoutany heightwise movement of the feedecarriage.

The illustrated machine is equipped with a high-speed rotarycut ter for trimming the edge of the sole of a shoe, and this trimming instrumentality is a part of an operating unit to which the aforesaid roll and pitch motions are imparted independently of the motions imparted to the shoe. The roll motion is an angular motion about a fixed axis parallel with the path of the feed-carriage, while the pitch motion is one about an axis that intersects the :roll'axis and lies at right angles thereto and at right angles also to the rotational axis of the cutter.

One of the improvements embodied inythis organization consists in locating the point-of intersection of the roll axis and the :pitch axis at the point of tangency of the perimeter of the cutter and the trimmed perimeter of the sole. This point of coincidence is fixed, in spaced-and is preferably located in the plane of the welt surface, if the shoe has a welt, or the corresponding surface ofa shoe that hasno welt. Consequently, the plan configuration-generated byuthe trimming cutter will notbe-mo'dified in the plane of the welt surface but will bedevelopecl strictly in accordance with the shape of the bodyiof the shoe or a pattern cam, as the casemay 'be.

Referring to the drawings which illustrate. an automatic edge trimming machine embodying the improvements hereinafter described,

v Fig. 1 is a front elevation in which a shoe is in contact with the trimming cutter as at the starting point of the trimming operation;

Fig. 1A is an elevation of a size gauge '(see Fig. 1, right) for indicating the starting position; v

Fig. 2 is an elevation of the machine from the left-hand side;

Fig. 3 is a plan view partly in horizontal section;

Fig. 4 is a flat development of a vertical sec- Ition indicated by line IV-IV in Fig. 3, and-inviewed -cludes the main cam assemblage and a train of gearing for displacing a shoe from the cutter at the conclusion of a trimming stage;

Fig. 5 is an elevation, as viewed in Fi 2 but partly in section, of; the trimming unit and the' mounting by which it is supported and rocked to give it rolling and pitching motions;

Fig. 6 is a large scale view of the trimming cutter as viewed in Fig. 5 and the trimming guides supported below it;

Fig. 7 is a top plan View of the work-engaging portion of one of the trimming guides included in Figs. 5 and 6;

Fig. 8 is a top plan view, partly in horizontal section, of mechanism included in Fig. 5 for producing a Baltimore edge;

Fig. 9 is a diagrammatic View from the standpoint of Fig. 5 but representing the principle of the rolling motion of the trimming unit;

Fig. 10 is a front elevation of the trimming unit (compare with Fig. ,1) and the connections for producing its pitching motion;

Fig. 10A is a side elevation, partly in section (line GG in Fig. 11) of some of th elements of the linkage by which the trimming unit is rocked sidewise as indicated in Fig. 10 by the cam shown in Fig. 11. The direction of view of Fig. 10A is the same as that of Fig. 2;

Fig. 11 is a top plan view of an assemblage included in Fig. 3 and comprising means for rocking the trimming unitsidewise and means for retracting all the cam arms from their cams when the latter are to be shifted along their axis;

Fig. 12 is a top plan view including the feedcarriage, a feed cam and a pantographic mechanism by which the carriage is operated;

Fig. 13 is a vertical section through the means for locking the pantograph (see line XIIIXIII in Fig. 12)

Fig. 14 is a top plan view of the locking means in the plane of line XIV-XIV in Fig. 13;

t Fig. 15 is a horizontal section of means for controlling the locking means (see line XVXV in Fig. 13); t I

Fig. 16 is a top plan view of the mechanism for turning a shoe end for end;

Fig. 1'7 is a horizontal section of a detail of the turning mechanism included in Fig. 16, th detail appearing also in Fig. 1 DD;

Fig. 18 is a top plan view of a cam and connections for imparting rolling motions to the trimming unit. Their location is indicated by dotted lines in the lower part of Fig. 2;

Fig. 19 is a top plan View including the feedcarriage and mechanism for displacing a shoe from the cutter at the conclusion of the trimming stage (compare with Figs. 3 and 12);

Fig. 20 is a side elevation of the feed-carriage and the jack standing as in Fig. 2 but including a partial section indicated by line XX-XX in Fig. 19;

Fig. 21 and Fig. 22 are respectively a horizontal section (compare with Fig. 12) and a vertical section (compare with Fig." 20) of automatic mechanism for fixing the height of the jack-post and latching the jack in a retracted position;

'- Fig. 23 is a top plan view, partly in section, of

parts of the power assemblage (see upper left of Figs. 1 and 2 for location) by which the several trains of mechanism vare actuated;

Fig. 24 is a top plan view (compare with Fig. 8) of a driven assemblage including an automatic sto'p mechanism; I

- Fig. 25is atop plan view, partly in section, of

between lines CC and up of its constituent parts.

described.

intermediate gearing (see upper right of Fig. 4) located at a level above the gearing included in Fig. 23;

Fig. 26 is a horizontal section (compare with Fig. 23) of aroller clutch (see lin XXVI- XXVI in Fig. 20) V Fig. 27 is a side elevation of the jack;

Fig. 28 i an elevation of the heel end of the jack; and

Fig. 29 is a vertical section indicated by line X-X in Fig. 2'7.

Wherever the numeral H) is applied to an element it designates a part of the stationary frame structure regardless of how the latter is made Two parallel horizontal rails I I, I2 affixed to the front of the frame provide a track on which a carriage I3 is arranged to travel in a straight horizontal path to feed a shoe lengthwise. The carriage is provided with antifriction rollers that run on-the rails. A counterweight l4 and a flexible cable l5 (Figs. 3 and 12) pull the carriage to the right after each trimming operation. The feed motion from right to left is produced by a cam l6 and linkage including a pantograph by which the range or the carriage may be graded according to the length of a shoe. The details of this linkage are herein-after The perimeter of the sole i! of a shoe i8 is trimmed progressively along both sides and. around the toe end by a rotary cutter 20 (Figs. 5, 6, 8, 9 and 19) of common design comprising a series of teeth each provided with a cutting edge. The machine is so organized that the trimming begins at ornear the breast line on one side, as shown in Fig. 3, and ends at 'a corresponding point on the opposite side, as shown in Fig. 19,. but after completion of the trimming operation: the shoe is displaced from the cutter and the parts thereafter'return to their initial positions before all automatic operation is stopped.

The cutter 20 is afiixed to the lower end of an upright shaft 2| by a circular disk or shield 22 the margin of which projects slightly beyond the cutting edges and provides a ledge to be overlapped and engaged by the marginal extension of a sole H. A supplemental ledge 23 arranged to ride th lower surface of the marginal extension is formed on a block 24 (Figs. 6 and 7) In operation the ledge 23 and the cutter are upheld or floated by springs and governed with regard to height by the overlapping marginal extension of the sole. The-cutter-20 is thus moved up and down as the thickness and heightwise curves of the marginal extension require such movements to maintain true register of the cutter and the work.

Once a shoe has been jacked and placed in contact with the cutter it is upheld by a spring that maintains the tread surf ace of the sole against the bottom of a roll 25 that constitutes a height gauge or tread rest. The elements 20, 24 and 25 are all included in an assemblage that rocks about two axes to counteract lengthwise and crosswise curvatures of the shoe bottom. This assemblage also includes an electric motor 26 for driving the cutter. The'casing of the motor is affixed to a support 21 which, as shown in Figs. 5, 8 and 9, is provided with a'cylindricalstem 28. Th axis A-A of this stem is one-of the two axes above mentioned. The stem 28 is'journaled in a bearing in another movable support 29, and the latter is arranged to rock about a fixed horizontal axis indicated by a dot B in Figs. 6 and 9 and by a broken line 3-43 in Figs. 8 and 10. The axis B is l j i herell l with theze thi zthewiees rwe eeegjihn fein th flippe -t3 .;r ehsebeue hth .e eieWe s: lhert s u ic ue in h n I h ehis. hi e eheeht teltheln timete eelit ze sii ein e A... I 521 9 the'eut erel e 'nte eteh ehte leeets th -e ni .B e p h itrs h m h a i ht an le to .itfieh eeuehtl. th ze tte vlhe h :ree ee -award end he k FL- We l Le ei ev the operative portion of thelpnttgr w llgema n ga t the zlee zieh-h tthi h i t i fix dne nt .q 9nt et the-sel z h {the hei ht ehe e :2 i h ereeitghevh tethi pe hfi htere etie .W h ,dB -hI 9W-?I e a' h hie h ee t h e eett ehethh F -5) ieurhe e eh eh el v iet hl e eevefifi t eh i v e wdifahd l eeme hted h e eu e t 5 Band 9 hee d he to h g h em h tu 5-- Be h le ers 13. ere eehnee e t i he eeti e e emen .Q e 1 91, heidefi .eah i dh the @efiiil e the mete ut o the-eql he .ie 1 .d e the utte end the led e Z eJieh l -e the e ie ee ehei the mine etaehi eeu e t e ehe mat e ll tau ht. me h hed t the i we evel t e ab e zh e of '1 sho t stehe it p siti n und th l ehtee e l5: Fer-thi :PP-IEQSB a sn i getnee ed teh $145 air n ed t eoe eret w t e er iectien forme hehe f the levers 34.

3 n trai hez h pq A L fi e- 5 end he eek ab ut th axi Withou eeeueviee .ehv .spee re i e y the cutte end th ek 25 th e ho t is p ovided Wit he he r of e uet .y1 n. riee eh ee 3. Qh at ehh we; n eeeh fiehee gui by thr e e e. .on en a i it eeneave s a end w. h e he i LBQIIYXLSHI" face T e r01 5 e Quht d ohe et ener etuds ehe eh pro ed v i-t; head I'heeh deere ieH-v 'ia' e eh ahd-thehiheed e er en ee to be seated against tpgrgllel jeges of the-sup.- he t t p en sieew. .e m emen f th let wit eh ob t ucti g an ula m vement ebeutrthe h eehter o eu vet 'e of h -fian esefi eelhe d e-wi h axis 33- l v The t ai er m hani m o p ra n the suph rt .4 a hhk e v r 45 (t -fi 3 ;D h1n view). a d e .5 h lever 5 i e se m e -ted a eeh hef '4 hi h ser e as t fulc um.- le d harried the su .29 uti iz s the terse of av t to m ihte h t le e 4 einet the cam .46. .t

The train e mechan sm er reehi-n the eu nert 2- i 9. ehe e ie eem iee l-W t 4. e z s t theet m fi (l l e- .1 a r d-v 9 mevebl h wiee.. hbeei hee h?! in. thei u pe t 2 a r d 5 movabl ehdwie i a h edbeeringi he ram m. a th ee-arm d e er 3- uneas a bell crank 55 (Figs. 3 and 10A) a link 56, alever .5 e d a am 5 .re kehe t M eer ese t u crum .e e le er .51, and th letter iehe d a ainst ts ee b es -r n 59 (Fi l-Q) a eeunte wei ht 5 beth' eh eted .te e e r .53 he eneretihe enn ehen between the re s!!! enJete th e mpriee e hk .42 (Fi 2 hen erenk ;.s.ta e h plun er 12 is oper ed et the bearing eee n ie w th whiehit i connected -y .m ve heh f th zmdum atelroekihg the-hum Me i us at er elements. heed .isv einxed to zth ,iaekeetehd t e le e i :no h y (carried .sL me b the ehr h e 41.3 .but isralse eapable...of g ab u i own axis, m ng-.u end L WD ee @QI i s ax s end t lt ng e quhe fixed axis C=. C that ;1ies.=pa 1tal.1 e1 vvithaxis W +1 had-w th the path DI the ieerrl e lee -ne emi h eug above and lbel w e .hee i hge eeve fifi he iheh hei Qte'rms-t-1 eon- ,he te t the eerria Jey t unni ns These t a i n hee th axi -Gent! co ra t .Jafiki h ;1t to an llDI htpQSitiOn for a, trimmin operation and to lean forward between'rtrimming eperet ensf A mpres ion sp ing 69 :22)

eh euhde the deck-pest nd no mally raises it t maintain the tread.- face of a=$01e against the hei. teauge F g' 5-) during the time allotted t0 :nenmallv d awn eeeinstthe cutter y a tension :Splillg 10 (Figs. 19 and ;21)..one.en.d Of whieh'yis enoho regl to'the cayrie ge =13 andwthe tether end attached to :a fin er H .carried by the bearing e e e 15s. h

A the conc usion fe trimmi g Qperatiqn, but he qre the hoe is nemovedifr m. the-cutter .20 itenn es h ee t on ehewn in A h gle -.ve 66 forward about C Q but the prihah e$. :t epeh ih {this Plunger. is to secur th fiaek-pe t a ai upwa d movemen before the shoe leaves contact ,withthe height gauge Th l n er -2 den'ves its mo n m a eeeentr tr 1.4 and lever 15,. The-eccentric is, cerx ied by a shaft '16 that remains at rest ex-.

Q pt when the stagejn questionis reached, where.- upon it receives one revolution from a clutch h e aft r des bed.-

thevlun er 12.515 ope ated its forward end eth kes and move a rod 11 Fig. 21) arranged.

in a bearing carried by theearriage l3. Thi s'rod ee ries 1-3.1 yeke 78 that gtliaddlesthe beeringsleeve 6.6 and has pivots 19-by which its arms are con neoteq to a, pair pf levers 80 both afiixe d toa. goekshait' 8 I. A cam 82, also affixecl tothe rock- ,shaf eng es e elampin pa 83. closely but not tightly fitted into an opening in a, bushing 84. This bushing is afiiX d to the .sleeve 55 and prosles e'heerih ior an h ushing throu h which th jack-pos extend turn with re pec o he bushing 85 but y-not move up or down except when the bushing. 85 I is free to do so, because thisjbushing-is confined b tween co la s 819 and 8.1 fixed to h p t.

In o eratio he pul 'of the spring .10 esists th thru t of th plun er 12- consequ n v. the

first efiect of the plunger is to-set the clamping 1 pgglflg egainst the bushing 85 With enoughforce to segu e it despite the lifting force of the :spring 6.9 When the clamping movement is arrested by the bushin 85 the remainder (of the forward travel of the plunger tilts the jack about -a,xis

-C and ther by car es the shoe way from he ei ht au e 25- Asho 1der a8 Qn the .71 s, er by ,eerried beyond -a s ring-stressed late 8. which d ops behind it, tomaintain. the

n undercut mming. The perimeter of -a .shoe sole is The ja k-p s may jack in its forward position (see dotted lines-at right of-Fig. 2) when the plunger 12 is retracted. The carriage I3 is provided with a handlever 90 by which the latch 89 may be pulled out when the next shoe is ready to be presented to the cutter in the position represented in Fig. 3.

Viewed from above (see Fig, 16) the jack-post 35 is normally turned in a clockwise direction by arm II5 are released and free.

operation; and automatically unlocked in consequence of one revolution of the cam I6. The pantograph is therefore free to be adjusted during the periods of rest, and such adjusting is effected by moving the carriage I3 manually along itstrack to a starting position consistent with the length of a shoe about to be trimmed. At such times the lever I2I is held against its cam I6 by the weight I4 while the carriage and the A size gauge hereinafter described is provided to enable the operator to find the desired initial setting of the carriage for this purpose.

axis CC and has a spline connection with the I 7 post that enables the latter to slide up and down without moving the pulley. The spline 91 (Figs. 1 and 17) is flanked by two rolls 98 both carried by the pulley. The cable is fastened to the pulle 95 by a clip 99.

A bar I00 (Fig. 1) for turning the jack-post 65 is arranged to oscillate about a fixed axis D+-D- that lies parallel with the path of the carriage I3. The operating surface of this bar is fiat and it also lies parallel with the path of the carriage.-

the axis of which coincides with the axis D-D.

One end of a flexible cable I06 is anchored to this quadrant and the other end is anchored to a pulley I0! formed on or affixed to the pulleyj96.

These pulleys are mounted on the carriage I3 and are constantly stressed by the weight 0| to keep the roll I 03 in contact with the bar I00.

The motion for operating the bar I00 is derived from a train of mechanism (Fig. 2) comprising a link I08, a lever I09, a link H0, a lever III (Fig. 16) and a cam 92 (see also Fig. 20) The lever I99 is mounted on the frame I0 but the lever II I is loosely mounted on the rockshaft 41 which serves as its fulcrum. The constant pressure of the roll I03 against the bar I00 keeps the lever III against its cam.

The linkage for moving the carriage I 3 to and fro along the rails II and I2 (Figs. 3 and 1-2) includes a link I It, a pivoted arm I I5, a link I I6, pantograph members H1, H8 and H9, a link I20, and a lever'I2I' engaging the feed cam it. The rockshaft 41 serves as a fulcrum for the lever !2I but is not turned by it. The arm H8 is mounted on a sleeve I22 (Fig. 13) arranged in a bearing in the frame I 0 and constrained to oscillate about a fixed vertical axis F-F. The link H6, the radius bar H1 and the locking bar II!) are all connected by a common pivot I23. Since the link H6 is carried by the arm II5 while the bar II! is carried by the arm H8, adjusting the pivot I23 toward or from axis F will decrease or increase the angular range' of the arm H5 and in correspondin degree alter the length of traverse of the carriage I3. The operator will adjust the pantograph according to the length of a shoe, but to do so he has only to give the carriage an intial setting.

The pantograph is provided with mean by which the bar H9 is automatically locked with respect to the sleeve I22 in consequence of depressing a treadle 200 to trip the machine into Referring to Figs. 13 and 14, the locking bar II9 extends through a groove in the upper end of the-sleeve I22 and'is retained therein by a coverplate I24. One side of the bar is provided with a series of locking teeth I25 to be engaged by complemental teeth formed on a locking dog I26 normally pressed against the bar by a compression spring I 21. 'The lower portion of the dog (Fig. 13) has no teeth but only a smooth surface to be engaged by a cam I28 that underlies the bar I I0. The purpose of the cam is to disengage the dog from the teeth I25. The cam is formed on a stem I29 that has bearings in the sleeve and projects below thelatter where an operating arm I30 is affixed to it. One end of a tension spring I3I is attached to the arm I30 and the other end is attached to an arm I32 aifixed to the sleeve I22. These parts are so related that when the spring I3I is unopposed it will disengage the cam from the dog I26 and permit the latter to lock the bar H0. This condition is the one that prevails While the cam I6 isin operation, but when, at the conclusion'of a cycle of revolution; the high part of the cam leaves the lever I2I, the pantograph' assemblage will be turned counterclockwise by the weight I4. During the final stage of this turning the arm I30 will oncounter a vertical pin I33 (Figs. 2 and 3) and be arrested thereby while the sleeve I22 continues to will disengage the dog I26 from the teeth I25 and leave the bar H9 and the arm 5 free for the next setting. The arrestingpin I33 is normally raised by a tension spring; I34 (Fig. 2) into the path of the arm I30 but may be drawn down to release the arm'when the machine is about to begin a trimming operation.

The cam assemblage (Fig. 4) includes thirtytwo cams all arranged in a single stack and strung on a sleeve I35 to which they are keyed by one long key I36. The cams are assembled in four groups of eight in each group, but in the drawing of the assemblage only the lowest cam of each group is shown in section. These are (reading up) the roll cam 46 fora right shoe, the turning .cam 92 for a right shoe, the pitch cam 58 for a right shoe and the feed cam I6 for a right shoe, all designed for one style of last. The seven other cams of each group are indicated with dotted lines and their margins broken away. This equipment provides for operating on four styles withjone setof thirty-two cams, the first and second cams of each group being mated as right and left for one style, thethird and fourth asright and left of another style, and

rounds and engages an adjusting shaft I30 but is not-keyed thereto. An arm I39 affixed to the upper end of the shaft is provided with a locking pin I40 arranged to enter'a socket I in the frame I0, and the pin isprovided with a handle I42 by which it may be withdrawn from its socket and by which the shaft may be'rotated. The lower end of the shaft is provided with a coarse screw thread I43 the pitch of which is commensurate with the distance from the. bottom of each cam to the bottom of the next. The sleeveis supported by a nut I44 arranged to slide up and down in a socket I45 and prevented from turning by a spline I46. .A collar I41 affixed to the sleeve supports the stack of cams. One revolution of the shaft I38 will remove one set of four cams from their operative positions and place another set in those positions, but to facilitate such shifting the machine is provided with means 'by'which the levers 45, III, 51 and PM may all be retracted far enough to insure clearance.

For the purpose last mentioned, a lever I48 is aifixed to the rockshaft 41 between the levers 51 and I2I, and an'arm I49 is located between the levers 45 and I I I and. likewise afiixed to the rockshaft. A hand wheel I50 (Figs. 1, 2 and 3),the hub of which has a bearing in'the frame I0, is connected to the lever I48, the connections including a screw shaft II anda link I53. The hub of the hand wheel'has an inside thread and constitutes a nut for moving the shaft- I5I endwise. Thelever I46 (Fig. 4) has two lugs I54 one'projecting up-to engage a correspondinglug on the lever I2I and the other projecting down to engage a lug onthe lever 51. Likewise the arm I49 has twolugs I55, one for engaginga lug on the lever III and the other'for engaging a lug on the lever 45.' 'When'the rockshaft 41, as. viewed in .Figs.'3, 11, 12, 16 and 18, is turned clockwise by the hand wheel I50 the levers I2l, 51, III and 45 are retracted all at-once from their cams. After the shifting of cams has been effected the hand wheel will .be let off to place the levers under control of their respective cams.

Rotation is transmitted to the gear I31 (Fig. 4) by a train including a long pinion I51, a shaft I58 keyed to the'pinion, aworm wheel I59 and other elements hereinafter described. The axial extent of the pinion is sufl'iclent to maintain driving engagement withthe gear I31 Wherever the latter may be adjusted by the screw shaft I38. This pinion also transmits rotation to the eccentric 13 through a train including an intermediate gear I60, a gear I6I formed onthe driving member 162 of a roller clutch, the driven clutch mem-' ber I63 and the shaft 16. The eccentric 13 is the actuator by which the jack is tilted forward to remove the shoe from the cutter at the conclusion of the trimming stage.

The driving member I 62 of the roller clutch rotates throughout the entire operating cycle of the machine, but the driven member I63 remains at rest until the trimming is completed, where'- upcn it is tripped into operation for one revolution and then stopped; As shown in Fig.26 (last sheet), a series of rollers I64 and an annular roller cage I65 are interposed between the clutch members. A Stop shoulder I06 formed on the cage abuts initially a stop finger I61movable to and from its path of rotation. One end of a tension spring I 66 is attached to a pin I69 carried by the driven member J63, and the other end is attached to alug on the cage, but so long as the cage is arrestedthe driving member -I62.may rotate without driving the member 463. Operation of the clutch is caused by displacing the finger I61 from the shoulder I66. The finger is aflixed to the lower end'of a vertical rockshaft I (Figs. 4 and 23) and is'normally held in the path of the shoulder I66 by a tension spring I1I. Another finger I12 (Figs. 1 and 24), afiixed to the upper end of the rockshaft, projects into the path of a lug I13 carried byarotary timing'disk I14. Still another finger. I afifixed to therockshaft... I10 is arranged to close a normally open. switch I16 in an electrical circuit I11 that 1 includes the solenoid 36 (Figs. 5 and 24). The cutter 20. and the ledge 23 are thereby depressed below their operating level atthe instantwhen the one-revolution clutch I63 retracts the trimmed shoe from the cutter.

The power for operating the cam assemblage (Fig. 4) is derived from an electric motor I80 (Figs. 1, 2 and 3). Rotation is transmitted by belts it! from a pulley on the motor shaft to a pulleyIfiZ (Fig. 23) v ailixed tothe driving mem ber I63 of a friction clutch of the cone type. The driven member I84 is affixed toa shaft I85 on which the driving member may turn freely when disengaged from the-driven member by a compression spring I86. A forked arm I81 aflixed to a rockshaft I88 is arranged to shift the driving member against thedrivenmember. An antifriction thrust bearing I89 is in'terposed between the forked arm and the driving member. An- I other arm I90 affixed to the rockshaft is arranged to be drawn down byatreadle 200 (Fig. 2) to startthemachine. f i v Rotation of the driven member I84 (Fig.-23) is transmittedby a gear I9I to a gear I92 (Fig. located above it and affixed to a shaft I93. Aworm I94.carried by thisshaft drives the worm wheel I 5.9 (Fig. 4) and the gear trains hereinbefore described. A spur gear 195 formed on the hub of the Worm wheel drives-an'internalgear I96 (Figs. 5 and 25) affixed to the lower end of. a stem I.91.on which a pinion-190 is formed. This pinion drives a. gear I99by which-the timing. disk 114- and two edge-gaugecams 2I6 and 2I1 are carried (see also Fig-24). i i

'The treadle 200 (Fig. 2), connected to the frame by a fulcrum-pin.20l,- serves not only to a start the machine but also to lock the pantograph. One flexible cable 202 connects the treadle and the vertically movable pin 1 I 33which, when pulled down, releases the armI30and other elements by which the springI3I locks-thepantograph. An-. other flexible cable 203 connects the treadle and a vertically movable rod 204that extends through a hole in the arm I90 (Fig. 23) and is provided with a latching block 205 (Fig. -1) at its upper end. This rod is normally held up by a com pression spring 206 but it also extends through a compression spring 201 seated on the upper surface of the arm I90. The spring 201 is'ini-'\ tially relaxed, but when the rod 204 is ,pulled down a nut.208 carried thereby compresses the spring enough to engage the clutch despite the opposition of the weaker. spring I86. The treadle first pulls down the pin .I33vfar, enough to release the lock of the .pantographbefore the clutch is engaged, and thereafter compresses the spring 201 enough to engage the ..clutch and place the upper end of thelatching block 2.05 below a latch-' ing pawl 209., A tension spring-2H) (Figs..4 and 24) then moves the pawl to its latching positionto maintain the engagement of the clutch until a cycle of the cams is completed.

Thelug I 13 (Fig. 24) after actuating the finger I12, trips the latching pawl 209 in consequence of actuati g a finger 28 I, and thus permits the springlBB to disengage the clutch. The tripping extensions wider at some points than at others.

For example, the extension may be wider throughout the forepart than along the shank, or the outer margin of the forepart may be wider than the inner margin and the toe margin, as in the so-called Baltimore edge. To providefor varying the width of an extension as the trimming operation progresses, the block 24 is provided with an automatic edge gauge 2I5 to be operated by a cam that rotates at the same angularyelocity as the cam assemblage shown in Fig. 4' but about another axis. Two cams 216 and 2l'1 for this purpose are represented in Fig. 5, one in dotted lines to indicate its location when superposed upon the other as it'would be in practice. These cams are mates, on'e'for a right shoe and-the other fora left, and both maybe detached and replaced by another pair designed for another'style of shoe. are stacked upon the driven unit comprising the timing disk H4 andwthe gear I99 which rotates about a fixed spindle ,2 l8 and is provided with an upstanding pin 2l9 for registeringthe ca'mswith respect to the timing disk. Each cam has a hole to receive the spind1e-2l8and another hole to receive the r'egisteringpin. v v R H Abellcrank 22!], (Figs. 5 and 8) is mounted on an upright fulcrum stud 22! to be Operated by one-cam or the other, as the case may be, the

v stud having sufii'eient length above its anchoring boss 222 to extend through the hub of the bell crank when the latter is supported at the level required by the upper cam 2H, but in Fig. 5 the hub of the bell; crank is seated directly on the boss 222 and thereby supported at the. level They gauge and the cutter is not affected by rocking the support about axis A norby heightwise movements of the gauge andthe cutter. Moreover, the incurved surface of the arcuate plate 225 constitutes a segment of a cylinderthe axis of which coincides with axis'B except when it is shifted slightly to the front or rear of the latter by an edge gauge cam. This surface preserves the relation of the edge gauge and the cutter despite angular movement of the trimming assemblage about axis 13.

The edge gauge 2 I 5 is undercut to provide a fiat Ivertical face 230 (Fig. 6) which need not be used for all shoes but which may be used to supplement the gauging lip-2l5, provided the shoe in process of being trimmed carries a trimming templet of the type set forth in United States Letters Patent No. 2,293,080, granted August 18, 1942, on my application. In these circumstances the surface 230 will be traversed by a straight portion of the templet extending along the shank of the shoe and the course of the trimming will then be governed by a gauge cam while the lip 2L5 remains out of contact with the templet.

The jack, considered individually, constitutes the subject matter of my copending application for United States Letters Patent, Serial No. 488,484,'file'd.May26, 1943, in which its novel features and details of construction are shown and described at greater length than here. The head 64 of the jack is provided with a toe rest 23! (Fig. 27), two thin flexible plates 232 (Fig. 29) arranged to clamp the forepartof a shoe widthwise, two plates 233 .(Fig. 28) arranged to clamp the counter portion widthwise, and a heel supporting member 234 arranged-to abut the back of the counter portion-in therand crease. The

forepart clamps 232 are curvedl lengthwise to insure. contact of their ends with the body of a shoe, and they may be sprung slightly when their intermediate portions are pressed toward a shoe by applying clamping pressure. In this respect they have the characteristics. of semi-elliptic leaf springs. A mechanism for closing and opening the forepart clamps includes an operating handle required by the lower cam 2! 6. When the upper a cam is to be useda collar not shown) will be interposed between the boss and the hub of the bell crank to support the latter at its upper operating level, i

- One arm of the bell crank is arranged to oper- 1 ate a plunger 22? (Fig. 8) against the thrust of a compression spring 22 4 that normally keeps the other arm against the cam in use. The plunger 223 has a bearing in an element of th frame with which it has aspline connection to prevent its turning. An arcu'ate plate 225 affixed to the plunger is arranged to. abut the rear end of another plunger 226 that extends through the stem 28 of the support 2'! and has bearings therein.

The axis of this plunger coincides with axisA. 'Ifhe'forward endof the plunger 226 is provided with a flat face 22'! in a plane at right anglesto axis A and arranged to abut the'rearlend of a stem 228 on which the edge gauge, 2 l5is formed.

'I'hisstem has a bearing in the block 24 and maY.

slidelengthwise therein, .The p-ressureof a shoe ag'ainstthe edge gauge issufficient to keep the stem 228 against the face 221 and the plunger226 against the plate 225. Since th block 22, the edge gauge 2l5jan'd the plunger 226 are all carried'by the support 21. the relation of the edge 235 and connections, some of which app-ear in Fig. 29. This mechanism is controlled by a ratchet and retaining pawl, not'herein shown, to maintain clamping pressure. p

The toe rest 23I maybe adjusted up and down by turning a knob 241, and may be locked at various levels by an arm 235 that turns with the knob and carries a pin arranged to enter holes in the head .64. In practice, the toe rest Will be set at a level that will insure a gap between the upper edges of the clamps 232 and the overhanging marginal extension of a sole. This gap should be deep enough to enable the clamps to run under the lip 215 (Fig. 6) without touching it, while the lip bears on the body'of the shoe to control the course of trimming. 1

A toegauge 231' is carried by the head 64 and arranged to be moved up and down by a lever 238 which receives motion from the handle 235. When the clamping plates 232 are retracted or open, the toegauge is raised to be engaged by the toe of a shoe but not by the extension of the sole. Once a shoe has been located against this gauge the latter is carried down in consequence of depressing the handle 235 to close the clamping plates .232. Thetoe of the shoe is thus cleared for'engagement by the lip 2l5 of the edge gauge.

The plates 233 and the heel supporting member 234 are all mounted on a pair of brackets 239 (Fig. 28) carriedtoward and from thetoe rest by a pair of parallel links 242. The lower ends of these 

